./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/mapsum1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/mapsum1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash befec220f7e47e3c672ecda510923d232ca8d73dd5b744e98031f552117225df --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 23:40:58,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 23:40:58,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 23:40:58,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 23:40:58,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 23:40:58,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 23:40:58,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 23:40:58,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 23:40:58,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 23:40:58,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 23:40:58,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 23:40:58,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 23:40:58,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 23:40:58,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 23:40:58,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 23:40:58,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 23:40:58,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 23:40:58,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 23:40:58,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 23:40:58,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 23:40:58,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 23:40:58,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 23:40:58,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 23:40:58,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 23:40:58,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 23:40:58,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 23:40:58,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 23:40:58,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 23:40:58,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 23:40:58,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 23:40:58,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 23:40:58,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 23:40:58,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 23:40:58,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 23:40:58,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 23:40:58,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 23:40:58,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 23:40:58,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 23:40:58,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 23:40:58,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 23:40:58,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 23:40:58,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 23:40:58,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 23:40:58,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 23:40:58,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 23:40:58,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 23:40:58,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 23:40:58,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 23:40:58,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 23:40:58,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 23:40:58,408 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 23:40:58,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 23:40:58,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 23:40:58,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 23:40:58,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 23:40:58,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 23:40:58,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 23:40:58,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 23:40:58,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 23:40:58,410 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 23:40:58,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 23:40:58,410 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 23:40:58,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 23:40:58,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 23:40:58,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 23:40:58,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 23:40:58,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:40:58,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 23:40:58,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 23:40:58,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 23:40:58,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 23:40:58,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 23:40:58,411 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 23:40:58,411 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 23:40:58,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 23:40:58,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 23:40:58,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> befec220f7e47e3c672ecda510923d232ca8d73dd5b744e98031f552117225df [2021-12-16 23:40:58,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 23:40:58,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 23:40:58,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 23:40:58,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 23:40:58,617 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 23:40:58,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum1.i [2021-12-16 23:40:58,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec9e769c/e6f9cc6daa924e2ea81599fb9120f41c/FLAG31a1d9bfd [2021-12-16 23:40:59,021 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 23:40:59,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum1.i [2021-12-16 23:40:59,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec9e769c/e6f9cc6daa924e2ea81599fb9120f41c/FLAG31a1d9bfd [2021-12-16 23:40:59,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec9e769c/e6f9cc6daa924e2ea81599fb9120f41c [2021-12-16 23:40:59,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 23:40:59,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 23:40:59,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 23:40:59,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 23:40:59,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 23:40:59,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1779030c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59, skipping insertion in model container [2021-12-16 23:40:59,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 23:40:59,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 23:40:59,586 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum1.i[1300,1313] [2021-12-16 23:40:59,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:40:59,592 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 23:40:59,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum1.i[1300,1313] [2021-12-16 23:40:59,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:40:59,613 INFO L208 MainTranslator]: Completed translation [2021-12-16 23:40:59,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59 WrapperNode [2021-12-16 23:40:59,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 23:40:59,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 23:40:59,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 23:40:59,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 23:40:59,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,651 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-16 23:40:59,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 23:40:59,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 23:40:59,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 23:40:59,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 23:40:59,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 23:40:59,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 23:40:59,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 23:40:59,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 23:40:59,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (1/1) ... [2021-12-16 23:40:59,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:40:59,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:40:59,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 23:40:59,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 23:40:59,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 23:40:59,732 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2021-12-16 23:40:59,732 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2021-12-16 23:40:59,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 23:40:59,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 23:40:59,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 23:40:59,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 23:40:59,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 23:40:59,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 23:40:59,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 23:40:59,779 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 23:40:59,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 23:40:59,926 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 23:40:59,934 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 23:40:59,935 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 23:40:59,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:40:59 BoogieIcfgContainer [2021-12-16 23:40:59,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 23:40:59,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 23:40:59,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 23:40:59,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 23:40:59,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 11:40:59" (1/3) ... [2021-12-16 23:40:59,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d833bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:40:59, skipping insertion in model container [2021-12-16 23:40:59,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:40:59" (2/3) ... [2021-12-16 23:40:59,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d833bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:40:59, skipping insertion in model container [2021-12-16 23:40:59,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:40:59" (3/3) ... [2021-12-16 23:40:59,941 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum1.i [2021-12-16 23:40:59,945 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 23:40:59,945 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 23:40:59,973 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 23:40:59,980 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 23:40:59,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 23:40:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:40:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 23:40:59,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:40:59,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:40:59,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:40:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:40:59,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2021-12-16 23:41:00,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:00,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043008034] [2021-12-16 23:41:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:00,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 23:41:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 23:41:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:41:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 23:41:00,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043008034] [2021-12-16 23:41:00,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043008034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051071399] [2021-12-16 23:41:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:00,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:00,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:00,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:00,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 23:41:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 23:41:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 23:41:00,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 23:41:00,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051071399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:41:00,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 23:41:00,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 23:41:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987250829] [2021-12-16 23:41:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:41:00,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:41:00,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:41:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 23:41:00,317 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 23:41:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:00,335 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-16 23:41:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:41:00,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-16 23:41:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:00,341 INFO L225 Difference]: With dead ends: 50 [2021-12-16 23:41:00,341 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 23:41:00,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 23:41:00,345 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:00,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 23:41:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-16 23:41:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-16 23:41:00,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-16 23:41:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:00,388 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-16 23:41:00,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 23:41:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-16 23:41:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 23:41:00,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:00,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:00,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 23:41:00,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-16 23:41:00,615 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2021-12-16 23:41:00,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788190681] [2021-12-16 23:41:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:00,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 23:41:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 23:41:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 23:41:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 23:41:00,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788190681] [2021-12-16 23:41:00,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788190681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261439509] [2021-12-16 23:41:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:00,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:00,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:00,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:00,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 23:41:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:00,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 23:41:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 23:41:00,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 23:41:00,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261439509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:41:00,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 23:41:00,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 23:41:00,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533413815] [2021-12-16 23:41:00,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:41:00,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:41:00,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:00,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:41:00,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 23:41:00,843 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 23:41:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:00,850 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-16 23:41:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:41:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-16 23:41:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:00,851 INFO L225 Difference]: With dead ends: 42 [2021-12-16 23:41:00,851 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 23:41:00,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 23:41:00,852 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:00,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 23:41:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-16 23:41:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-16 23:41:00,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-12-16 23:41:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:00,872 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-16 23:41:00,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 23:41:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-16 23:41:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 23:41:00,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:00,873 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:00,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-16 23:41:01,093 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2021-12-16 23:41:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:01,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119795330] [2021-12-16 23:41:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:01,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 23:41:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 23:41:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:41:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 23:41:01,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:01,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119795330] [2021-12-16 23:41:01,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119795330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871816598] [2021-12-16 23:41:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:01,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:01,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:01,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 23:41:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 23:41:01,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 23:41:01,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 23:41:01,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871816598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:41:01,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 23:41:01,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 23:41:01,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685452610] [2021-12-16 23:41:01,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:41:01,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:41:01,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:41:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:41:01,308 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 23:41:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:01,325 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-16 23:41:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:41:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-16 23:41:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:01,326 INFO L225 Difference]: With dead ends: 39 [2021-12-16 23:41:01,326 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 23:41:01,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:41:01,327 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:01,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 23:41:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-16 23:41:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-16 23:41:01,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-12-16 23:41:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:01,334 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-16 23:41:01,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 23:41:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-16 23:41:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 23:41:01,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:01,336 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:01,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:01,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:01,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2021-12-16 23:41:01,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:01,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501761614] [2021-12-16 23:41:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:01,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 23:41:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 23:41:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 23:41:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 23:41:01,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501761614] [2021-12-16 23:41:01,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501761614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823075400] [2021-12-16 23:41:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:01,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:01,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:01,614 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:01,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 23:41:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 23:41:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 23:41:01,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 23:41:01,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823075400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:01,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:01,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-16 23:41:01,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999740144] [2021-12-16 23:41:01,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:01,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 23:41:01,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 23:41:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 23:41:01,814 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 23:41:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:01,841 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-16 23:41:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 23:41:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-12-16 23:41:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:01,843 INFO L225 Difference]: With dead ends: 54 [2021-12-16 23:41:01,843 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 23:41:01,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 23:41:01,844 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:01,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 23:41:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-16 23:41:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-16 23:41:01,848 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-12-16 23:41:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:01,848 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-16 23:41:01,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 23:41:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-16 23:41:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 23:41:01,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:01,850 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:01,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:02,069 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2021-12-16 23:41:02,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:02,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188842844] [2021-12-16 23:41:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:02,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 23:41:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 23:41:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 23:41:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 23:41:02,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188842844] [2021-12-16 23:41:02,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188842844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:02,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498787501] [2021-12-16 23:41:02,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:41:02,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:02,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:02,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:02,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 23:41:02,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:41:02,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:02,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 23:41:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 23:41:02,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 23:41:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498787501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:02,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:02,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-16 23:41:02,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984365349] [2021-12-16 23:41:02,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:02,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:41:02,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:02,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:41:02,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:41:02,509 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 23:41:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:02,567 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-12-16 23:41:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 23:41:02,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-12-16 23:41:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:02,569 INFO L225 Difference]: With dead ends: 70 [2021-12-16 23:41:02,569 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 23:41:02,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:41:02,570 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:02,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 23:41:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-16 23:41:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-16 23:41:02,578 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2021-12-16 23:41:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:02,578 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-16 23:41:02,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 23:41:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-16 23:41:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 23:41:02,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:02,579 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:02,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:02,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:02,783 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2021-12-16 23:41:02,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:02,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530927] [2021-12-16 23:41:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:02,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 23:41:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 23:41:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:41:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-16 23:41:02,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530927] [2021-12-16 23:41:02,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601637651] [2021-12-16 23:41:02,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:41:02,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:02,951 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 23:41:03,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 23:41:03,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:41:03,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-16 23:41:03,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-16 23:41:03,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601637651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:03,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:03,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-12-16 23:41:03,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901564947] [2021-12-16 23:41:03,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 23:41:03,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 23:41:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 23:41:03,218 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:03,261 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-12-16 23:41:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 23:41:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2021-12-16 23:41:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:03,263 INFO L225 Difference]: With dead ends: 82 [2021-12-16 23:41:03,263 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 23:41:03,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 23:41:03,263 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:03,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 23:41:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-12-16 23:41:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-16 23:41:03,268 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2021-12-16 23:41:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:03,269 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-16 23:41:03,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-16 23:41:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 23:41:03,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:03,270 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:03,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:03,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:03,486 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash 161581377, now seen corresponding path program 4 times [2021-12-16 23:41:03,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:03,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382956465] [2021-12-16 23:41:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:03,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:03,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:41:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 23:41:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:03,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 23:41:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-16 23:41:03,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382956465] [2021-12-16 23:41:03,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382956465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566699305] [2021-12-16 23:41:03,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:41:03,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:03,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:03,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 23:41:03,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:41:03,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:03,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:41:03,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-16 23:41:03,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-16 23:41:03,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566699305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:03,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:03,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2021-12-16 23:41:03,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085137717] [2021-12-16 23:41:03,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:03,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 23:41:03,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:03,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 23:41:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:41:03,954 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:04,011 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-16 23:41:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 23:41:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-12-16 23:41:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:04,013 INFO L225 Difference]: With dead ends: 100 [2021-12-16 23:41:04,013 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 23:41:04,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:41:04,014 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:04,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 23:41:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-16 23:41:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-12-16 23:41:04,019 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2021-12-16 23:41:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:04,019 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-12-16 23:41:04,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-12-16 23:41:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 23:41:04,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:04,021 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:04,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:04,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:04,232 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1010910917, now seen corresponding path program 5 times [2021-12-16 23:41:04,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:04,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140024472] [2021-12-16 23:41:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:04,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 23:41:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:04,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 23:41:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:04,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 23:41:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-12-16 23:41:04,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140024472] [2021-12-16 23:41:04,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140024472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202427177] [2021-12-16 23:41:04,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:41:04,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:04,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:04,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 23:41:04,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-16 23:41:04,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:04,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:41:04,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-16 23:41:05,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-16 23:41:05,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202427177] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:05,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:05,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2021-12-16 23:41:05,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214149383] [2021-12-16 23:41:05,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:05,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:41:05,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:41:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:41:05,317 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:05,398 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2021-12-16 23:41:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 23:41:05,400 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2021-12-16 23:41:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:05,400 INFO L225 Difference]: With dead ends: 126 [2021-12-16 23:41:05,401 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 23:41:05,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:41:05,402 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:05,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:41:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 23:41:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-12-16 23:41:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-12-16 23:41:05,407 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2021-12-16 23:41:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:05,407 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-12-16 23:41:05,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-12-16 23:41:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-16 23:41:05,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:05,409 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:05,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:05,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 23:41:05,620 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1009519917, now seen corresponding path program 6 times [2021-12-16 23:41:05,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:05,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404622048] [2021-12-16 23:41:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:05,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:05,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 23:41:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:05,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 23:41:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:05,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-16 23:41:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-16 23:41:05,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:05,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404622048] [2021-12-16 23:41:05,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404622048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:05,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6221469] [2021-12-16 23:41:05,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:41:05,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:05,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:05,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:05,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 23:41:06,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-16 23:41:06,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:41:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2021-12-16 23:41:06,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2021-12-16 23:41:06,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6221469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:06,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:06,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2021-12-16 23:41:06,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671811251] [2021-12-16 23:41:06,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:06,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 23:41:06,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:06,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 23:41:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-12-16 23:41:06,552 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:06,622 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-12-16 23:41:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 23:41:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2021-12-16 23:41:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:06,623 INFO L225 Difference]: With dead ends: 160 [2021-12-16 23:41:06,623 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 23:41:06,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-12-16 23:41:06,624 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:06,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:41:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 23:41:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-16 23:41:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-12-16 23:41:06,630 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2021-12-16 23:41:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:06,630 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-12-16 23:41:06,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-12-16 23:41:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 23:41:06,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:06,643 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:06,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:06,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:06,855 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash -794036833, now seen corresponding path program 7 times [2021-12-16 23:41:06,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:06,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536327374] [2021-12-16 23:41:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:06,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 23:41:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:06,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 23:41:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:06,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 23:41:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 23:41:06,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:06,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536327374] [2021-12-16 23:41:06,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536327374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:06,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430010999] [2021-12-16 23:41:06,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:41:06,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:06,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:07,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:07,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 23:41:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:07,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 23:41:07,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 23:41:07,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 23:41:07,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430010999] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:07,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:07,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-16 23:41:07,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318493660] [2021-12-16 23:41:07,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:07,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 23:41:07,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 23:41:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 23:41:07,731 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 23:41:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:07,787 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2021-12-16 23:41:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 23:41:07,787 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2021-12-16 23:41:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:07,788 INFO L225 Difference]: With dead ends: 207 [2021-12-16 23:41:07,788 INFO L226 Difference]: Without dead ends: 135 [2021-12-16 23:41:07,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 23:41:07,789 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:07,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:41:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-16 23:41:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-16 23:41:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2021-12-16 23:41:07,806 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2021-12-16 23:41:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:07,806 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2021-12-16 23:41:07,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 23:41:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2021-12-16 23:41:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-16 23:41:07,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:07,808 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:07,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:08,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 23:41:08,008 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1814541889, now seen corresponding path program 8 times [2021-12-16 23:41:08,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134539621] [2021-12-16 23:41:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:08,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:08,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 23:41:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 23:41:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:08,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 23:41:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 23:41:08,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134539621] [2021-12-16 23:41:08,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134539621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14392756] [2021-12-16 23:41:08,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:41:08,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:08,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:08,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:08,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 23:41:08,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:41:08,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 23:41:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 23:41:08,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 23:41:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14392756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:09,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:09,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2021-12-16 23:41:09,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635744289] [2021-12-16 23:41:09,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:09,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-16 23:41:09,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-16 23:41:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 23:41:09,917 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 23:41:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:10,060 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2021-12-16 23:41:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-16 23:41:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2021-12-16 23:41:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:10,062 INFO L225 Difference]: With dead ends: 271 [2021-12-16 23:41:10,062 INFO L226 Difference]: Without dead ends: 199 [2021-12-16 23:41:10,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 23:41:10,064 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:10,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:41:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-16 23:41:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-12-16 23:41:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2021-12-16 23:41:10,098 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2021-12-16 23:41:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:10,099 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2021-12-16 23:41:10,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 23:41:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2021-12-16 23:41:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-16 23:41:10,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:10,102 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:10,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:10,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 23:41:10,303 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash 438792703, now seen corresponding path program 9 times [2021-12-16 23:41:10,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:10,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139756636] [2021-12-16 23:41:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:10,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:11,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-16 23:41:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:11,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-16 23:41:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:11,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2021-12-16 23:41:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 23:41:11,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:11,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139756636] [2021-12-16 23:41:11,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139756636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:11,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397787637] [2021-12-16 23:41:11,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:41:11,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:11,508 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:11,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 23:41:14,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-16 23:41:14,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:14,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 23:41:14,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2021-12-16 23:41:15,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2021-12-16 23:41:15,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397787637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:15,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:15,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2021-12-16 23:41:15,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472293162] [2021-12-16 23:41:15,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:15,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-16 23:41:15,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-16 23:41:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2021-12-16 23:41:15,876 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:16,060 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2021-12-16 23:41:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-16 23:41:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 264 [2021-12-16 23:41:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:16,062 INFO L225 Difference]: With dead ends: 306 [2021-12-16 23:41:16,062 INFO L226 Difference]: Without dead ends: 234 [2021-12-16 23:41:16,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2021-12-16 23:41:16,065 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:16,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 122 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:41:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-16 23:41:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-12-16 23:41:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2021-12-16 23:41:16,073 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2021-12-16 23:41:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:16,074 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2021-12-16 23:41:16,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2021-12-16 23:41:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-16 23:41:16,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:16,077 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:16,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:16,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 23:41:16,301 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:16,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1765547295, now seen corresponding path program 10 times [2021-12-16 23:41:16,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:16,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806776341] [2021-12-16 23:41:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:16,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-16 23:41:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-16 23:41:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-12-16 23:41:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2021-12-16 23:41:17,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:17,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806776341] [2021-12-16 23:41:17,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806776341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:17,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207636815] [2021-12-16 23:41:17,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:41:17,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:17,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:17,603 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:17,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 23:41:17,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:41:17,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:41:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 23:41:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:41:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2021-12-16 23:41:18,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:41:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 1864 proven. 2764 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2021-12-16 23:41:20,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207636815] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:41:20,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:41:20,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 33] total 128 [2021-12-16 23:41:20,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875772940] [2021-12-16 23:41:20,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:41:20,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-16 23:41:20,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:41:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-16 23:41:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2021-12-16 23:41:20,605 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:41:20,885 INFO L93 Difference]: Finished difference Result 404 states and 447 transitions. [2021-12-16 23:41:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-12-16 23:41:20,888 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 362 [2021-12-16 23:41:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:41:20,889 INFO L225 Difference]: With dead ends: 404 [2021-12-16 23:41:20,889 INFO L226 Difference]: Without dead ends: 300 [2021-12-16 23:41:20,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2021-12-16 23:41:20,894 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:41:20,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 202 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:41:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-16 23:41:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2021-12-16 23:41:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 23:41:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2021-12-16 23:41:20,901 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 362 [2021-12-16 23:41:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:41:20,901 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2021-12-16 23:41:20,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 23:41:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2021-12-16 23:41:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2021-12-16 23:41:20,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:41:20,906 INFO L514 BasicCegarLoop]: trace histogram [186, 186, 64, 64, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:41:20,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 23:41:21,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 23:41:21,119 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:41:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:41:21,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1972129571, now seen corresponding path program 11 times [2021-12-16 23:41:21,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:41:21,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166982855] [2021-12-16 23:41:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:41:21,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:41:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:22,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 23:41:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:22,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2021-12-16 23:41:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:22,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2021-12-16 23:41:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:41:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 39275 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 35179 trivial. 0 not checked. [2021-12-16 23:41:22,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:41:22,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166982855] [2021-12-16 23:41:22,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166982855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:41:22,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084630759] [2021-12-16 23:41:22,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:41:22,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:41:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:41:22,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:41:22,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15